Dirt Bike Carburertor Main Jets
Dirt Bike Carburetor Main Jets & Jet Needles for Mikuni Carbs on Honda, Yamaha & KTM at JJ Motorsports
Fine-tune your dirt bike's fuel mixture for optimal power and efficiency with premium carburetor main jets and jet needles from JJ Motorsports. Our selection includes high-precision brass main jets (sizes 100-140) and tapered jet needles designed for consistent mid-range performance, smooth throttle response, and easy tuning in motocross, enduro, and trail riding. Compatible with Mikuni VM series carbs on popular models like Honda CRF, Yamaha YZ/WR, Kawasaki KX, Suzuki RM, and KTM SX/EXC, these Japanese-made components ensure accurate metering, reduced lean spots, and reliable operation in dusty, high-RPM conditions. From 4/042 main jets for VM18/26 carbs to J8-series needles for mid-throttle control, stock up on the parts needed for a full carb rebuild or jetting upgrade.
Shop trusted brands like Mikuni for OEM-quality precision. Explore related categories such as dirt bike carburetor rebuild kits for complete maintenance or dirt bike air and fuel for reeds and filters.
Top Dirt Bike Carburetor Main Jets & Needles
- Mikuni Jet Needle J8-6F08 – Precision tapered jet needle for mid-range fuel control in Mikuni VM series carbs; fits various OE applications, made in Japan for smooth throttle response.
- Mikuni Main Jet #100 - 4-Pack (4/042-100) – Brass main jet pack for VM18, VM24/26, TMX carbs; 6mm diameter, 12mm length, ideal for leaner mixtures in dirt bikes.
- Mikuni Main Jet #125 - 4-Pack (4/042-125) – High-flow brass jets for richer high-RPM tuning; compatible with Mikuni VM series and OE carbs on Honda, Yamaha, and KTM models.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
On Sale
MIKUNI Jet Needle J8-6EJ12-58
MIKUNI
MSRP: $10.50Now: $7.00Was: $10.50Fitments include several Mikuni VM model and some OE Mikuni carburetors, Jet needles control the fuel mixture in the mid-range throttle position, Some jet needles don't have measurements provided by Mikuni, Use charting to verify dimensions in...6EJ1258- SKU:
- 6EJ1258
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- J8-6EJ12-58
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
- UNITS:
- EACH
MSRP: $10.50Now: $7.00Was: $10.50 -
MIKUNI Jet Needle J8-6EJ12-59
MIKUNI
$10.50Fitments include several Mikuni VM model and some OE Mikuni carburetors, Jet needles control the fuel mixture in the mid-range throttle position, Some jet needles don't have measurements provided by Mikuni, Use charting to verify dimensions in...6EJ1259- SKU:
- 6EJ1259
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- MODEL:
- J8-6EJ12-59
$10.50Qty in Cart: 0Quantity:Price:$10.50Subtotal: -
MIKUNI Jet Needle J8-6EJ12-60
MIKUNI
$10.50Fitments include several Mikuni VM model and some OE Mikuni carburetors, Jet needles control the fuel mixture in the mid-range throttle position, Some jet needles don't have measurements provided by Mikuni, Use charting to verify dimensions in...6EJ1260- SKU:
- 6EJ1260
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- J8-6EJ12-60
- UNITS:
- EACH
$10.50 -
MIKUNI Jet Needle J8-6F15
MIKUNI
$10.50Fitments include several Mikuni VM model and some OE Mikuni carburetors, Jet needles control the fuel mixture in the mid-range throttle position, Some jet needles don't have measurements provided by Mikuni, Use charting to verify dimensions in...6F15- SKU:
- 6F15
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- NEEDLE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- J8-6F15
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
$10.50 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-625
MIKUNI
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN100606625- SKU:
- KN100606625
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- MIKUNI
- UNITS:
- 4 PACK
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 62.5
- TYPE:
- PILOT
$5.20 -
MIKUNI Super BN Series Pilot Jet - 4-Pack N100606-65
MIKUNI
$5.20Sold to dealers 4 per pack; sold to consumer as each, Made in JapanKN10060665- SKU:
- KN10060665
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 65
- MODEL:
- MIKUNI
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 4 PACK
- PRODUCT NAME:
- JET
- TYPE:
- PILOT
$5.20 -
MIKUNI Main Jet - #102.5 - 4-Pack N102221-1025
MIKUNI
$14.55Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN1022211025- SKU:
- KN1022211025
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- JET SIZE:
- 102.5
$14.55 -
MIKUNI Main Jet - #105 - 4-Pack N102221-105
MIKUNI
$14.55Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN102221105- SKU:
- KN102221105
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 105
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
- UNITS:
- 4 PACK
$14.55 -
MIKUNI Main Jet - #107.5 - 4-Pack N102221-1075
MIKUNI
$5.20Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN1022211075- SKU:
- KN1022211075
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- JET SIZE:
- 107.5
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
$5.20 -
MIKUNI Main Jet - #115 - 4-Pack N102221-115
MIKUNI
$14.55Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN102221115- SKU:
- KN102221115
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- JET SIZE:
- 115
- MODEL:
- MIKUNI
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- WATERCRAFT
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- UNITS:
- 4 PACK
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
$14.55 -
MIKUNI Main Jet - #120 - 4-Pack N102221-120
MIKUNI
$14.55Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN102221120- SKU:
- KN102221120
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- WATERCRAFT
- JET SIZE:
- 120
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- UNITS:
- 4 PACK
- MODEL:
- MIKUNI
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
$14.55 -
MIKUNI Main Jet - #135 - 4-Pack N102221-135
MIKUNI
$14.55Check dimensions before ordering, For CV and Power Jet carburetors as well as other OE applications that originally came with a N102.221 main jet, Sold to dealer in 4-pack, Made in JapanKN102221135- SKU:
- KN102221135
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- MAIN
- JET SIZE:
- 135
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- UNITS:
- 4 PACK
- MATERIAL:
- BRASS
- MODEL:
- MIKUNI
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- WATERCRAFT
$14.55 -
WSM Keihin High-Speed Jet 006-7130
WSM
$2.17For Keihin CDK 2 watercraft carbs, Made in Japan for WSM0067130- SKU:
- 0067130
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- BRASS
- MODEL:
- KEIHIN
- JET SIZE:
- 130
- TYPE:
- MAIN
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- JET
- UNITS:
- EACH
$2.17Qty in Cart: 0Quantity:Price:$2.17Subtotal: -
WSM Keihin High-Speed Jet 006-7132
WSM
$2.17For Keihin CDK 2 watercraft carbs, Made in Japan for WSM0067132- SKU:
- 0067132
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MATERIAL:
- BRASS
- TYPE:
- MAIN
- UNITS:
- EACH
- JET SIZE:
- 132
- RIDING STYLE:
- WATERCRAFT
- MODEL:
- KEIHIN
- PRODUCT NAME:
- JET
$2.17Qty in Cart: 0Quantity:Price:$2.17Subtotal: -
WSM Keihin High-Speed Jet 006-7138
WSM
$2.17For Keihin CDK 2 watercraft carbs, Made in Japan for WSM0067138- SKU:
- 0067138
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- MAIN
- MATERIAL:
- BRASS
- JET SIZE:
- 138
- MODEL:
- KEIHIN
- PRODUCT NAME:
- JET
- UNITS:
- EACH
- RIDING STYLE:
- WATERCRAFT
$2.17Qty in Cart: 0Quantity:Price:$2.17Subtotal: -
WSM Keihin High-Speed Jet 006-7142
WSM
$2.17For Keihin CDK 2 watercraft carbs, Made in Japan for WSM0067142- SKU:
- 0067142
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- TYPE:
- MAIN
- UNITS:
- EACH
- JET SIZE:
- 142
- MATERIAL:
- BRASS
- RIDING STYLE:
- WATERCRAFT
- MODEL:
- KEIHIN
- PRODUCT NAME:
- JET
$2.17 -
MIKUNI Needle Jet 990-793-004-Q-4
MIKUNI
$15.49Inside diameter increases in size as size’s code increases alphabetically and numerically, Genuine Mikuni needle jets will have series and size stamping for identification, Needle jets allow a great way for tuning carb at 1/4-3/4 turn throttle, Made in...159Q4- SKU:
- 159Q4
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- FEATURES:
- FOR VM 30 MM - 36 MM SPIGOT
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- JET SIZE:
- Q-4
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MODEL:
- TYPE 159
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
$15.49 -
MIKUNI Needle Jet 990-793-004-Q-6
MIKUNI
$15.49Inside diameter increases in size as size’s code increases alphabetically and numerically, Genuine Mikuni needle jets will have series and size stamping for identification, Needle jets allow a great way for tuning carb at 1/4-3/4 turn throttle, Made in...159Q6- SKU:
- 159Q6
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- TYPE:
- NEEDLE
- FEATURES:
- FOR VM 30 MM - 36 MM SPIGOT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- JET SIZE:
- Q-6
- MATERIAL:
- BRASS
- MODEL:
- TYPE 159
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$15.49 -
MIKUNI Needle Jet 990-793-004-Q-8
MIKUNI
$15.49Inside diameter increases in size as size’s code increases alphabetically and numerically, Genuine Mikuni needle jets will have series and size stamping for identification, Needle jets allow a great way for tuning carb at 1/4-3/4 turn throttle, Made in...159Q8- SKU:
- 159Q8
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- JET SIZE:
- Q-8
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- FEATURES:
- FOR VM 30 MM - 36 MM SPIGOT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- MATERIAL:
- BRASS
- MODEL:
- TYPE 159
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$15.49 -
MIKUNI Main Jet #260 - 4-Pack 4/042-260
MIKUNI
$5.20Fit Mikuni carburetors VM18 (clamp on), VM24-512, VM26-512, VM26-606, TMX Series and others that originally came with 4/042 main jets, Also fit several OE applications; check dimensions before ordering, Made in JapanKM4042260- SKU:
- KM4042260
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH:
- 12 MM (0,47')
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- FEATURES:
- FOR VM CARBURETORS
- JET SIZE:
- 260
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- MAIN
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- SNOW
- UNITS:
- 4 PACK
$5.20
